Furnace-door structure



Oct. 18 1927. k 1,645,764

A. s. MCCLEAVE FURNACE DOOR STRUCTURE Filed April 5. 1926 2 Sheets-Sheet1 och 18, 1927.

A. S. MCCLEAVE FURfiACE DOOR STRUCTURE 2 Sheets-Sheet 2 Filed April 5.1926 Arr Patented Oct. 18, 1927.

UNITED STATES PLTENT OFFICE.

ARTHUR SYDNEY MOCLEAVE, OF MONTREAL, QUEBEC, CANADA, ASSIGNOR OF ONE-HALF TO JOSEPH ALBERT DESNOYERS, OF MONTREAL, CANADA.

FURNACE-DOOR STRUCTURE.

Application filed April 5, 1926. Serial No. 99,833.

The invention relates to a furnace door structure as described in thepresent specification and illustrated in the accompanying drawings thatform part of the same The invention consists essentially of the novelfeatures of construction pointed out broadly and specifically in theclaims for novelty following a description in detail of an acceptableform of the invention.

The obects of the invention are to promote the combustion of the fueland particularly maintain the newly fed fuel in an active state ofdisintegration and thereby avoid the release of gases in their primaryand non-heating stages; to insure a constant and ready flow of air andat the same time eliminate any dampening effect due to low temperatures;to produce a device of the kind herein described at a low cost anduniversally applicable withminor changes for the differentinstallations; to facilitate the operations of the stoker and keep asteady pressure of steam in the generation of the same and in other usesmaintain an even temperature; to accompany the features illustrated anddescribed in the drawings and description attached to an application fora patent Serial No-. 6a,172, filed October 22,1925, by separatelyprotected elements that may or may not be used apart therefrom; andgenerally to provide a useful efficient and economical furnace doorstructure.

In the drawings, Figure 1 is a longitudinal sectional View of the airdirector and inside elevation of the air distributor showing the furnacefront and door broken away and in vertical section.

Figure 2 is a sectional plan View of the air director.

Figure 3 is a detail of an air distributor showing the inner slottedwall.

Figure st is a detail of an air distributor showing the outer wall andconnections to the inlet.

Figure 5 is an upper plan view of the ex tended sill forming the upperwall of the air director and the distributors alongside.

Figure 6 is a reduced perspective view of the complete structure.

Like numerals of reference indicate corresponding parts in the variousfigures.

Referring to the drawings, the extended sill 10 projects inwardlythrough the furnace front 11 for the greater portion of its length andis supported on the dead plate 12 and therewith forms the air directorchamber 13 forming the passage from the inlet 14 to air distributors 15and 16 on either side, the said sill 10 being here shown as flaringoutwardly, though the shape is entirely' a matter of installation. if

' The air passage through the chamber-'11 is made tortuous by means ofthe long baffles 17 and short baffles 18, the long baflies terminatingshort of the side walls to leave the passages 19 and 20 and the shortbaffles extending from the side walls to leave the central passages 21,thereby deflecting the air for heating purposes until it reaches the endbaifles 22 and 23, where it passes through the central passage 24 and isdeflected by the blank end wall 25 beyond the outturne d flanges 26 and27 to the air distributors 15 and 16 having the inlets 28 and'29 widenedto the fullest extent possible by the back turned sections 30 and 31 ofthe end baflies 22 and 23 and upturned portions 32 and 33 of the sill10.

Theair distributors l5 and 16 have the outlet slots 34 and outlet holes35 through the inner walls at the highest and inner'ends of saiddistributors for they taper to the flanges 36, which are bolted to thelugs 37 from the side Walls of the sill 10 within the furnace front 11.

The sill 10 extends outwardly beyond the furnace front 11 and the nuts38 enga e said front on the inner side and the bolts 39 carrying saidnuts 38 project outwardly from the sill lugs 38 through the fuel opening in the front 11 into the door frame 40.

The sill 10 is formed into a recess 1-1 at the extreme outer end toreceive the panel door 42, which runs behind the angle bars 43 and 14secured to the door frame 40. The sill 10 is flangeddownwardly at 45 atthe extreme outer end and behind this flange the air inlet 46 leads intothe air chamber 13 the flow of air therethrough being controlled by thesegmental damper 47 fixedly mounted on the shaft 48, which is ournalledin the side walls of sill 10 outside the furnace front, said side wallsbeing slotted at 49 for said furnace front.

The panel door 42 is here shown as operated by the sprockets 50 mountedon the shaft 51 journalled in the bearings 52 from the door frame 40.

which in turn is driven by the segmental the preferable means forcoacting with the.

ifiovel features set forth in detail hereinbeore. a V i t In theoperation of this device, the panel or slot door is opened and, closedby means ofthe foot lever, but this part of the mechanism is notspecificallya feature of this invention. 7 I

However the feeding. of fresh fuel naturally needs draft from belowrather than the dampening effeet of the air. from above,

therefore'thei'ndratvn air to the air distribiv tors is lessened or cutoff entirely by the rotating damper described.

The moment the flairie springs from the fuel "the top air is increasedand follows the tortuous p ath in the air chamber and becomesheated andflows iiito the air distributors on either side and from there escapesthrough the outlets tdmir with the carbon gases rising from the fuel toeffect good conrbustion and the resultant heating gases.

The assembly of-the parts in this invention a is essential in itsdetails and is very important in relation to the'particular form ofdoor, as it is of one structure therewith and plicity of the structuremust be emphasized I for every part is carried by the door frame bothinside and out and all that is necessary for cooperation is thepermanent dead plate of the furnace with the door sill to complete theair chamber and the furnace front with the door frame to support all the;par t s', therefore the device is a unit in furnaoe" construction and,applicable with minor" changes to many typesof furnaces.

lVhat Ijclaim is y I In afurnace? door structure, a door frame having anair inletipa ssage thereacrossf from. the underside, ay'alve adaptedtoclosesaid passage and suitablyoperateda-an air .direc tor formed offlaring-side distributing-1 having wide inlet; openings and outletopenings through the inner vvalls a sill;

ing; downwardly from the door frame, and 1' i t S b xe d upwa d t ned toa include said Wide inlet openings; central innenenclosure formingthe-air s sagefrpin the frame inlet and having; wau fleeting the airinits flow through a central inner opening to the main chamber under thesill and communicating. with thkafore: said distributing boxes andsaidjenclosure having contiguous lugs and bolts securingem togethe u a aSigned at Montreal; Canada, this 17th dayof March, 1926.7 it

ARTHlJlt

